Development of a Dual Polarization SIS Mixer With a Planar Orthomode Transducer at 350 GHz
Development of a Dual Polarization SIS Mixer With a Planar Orthomode Transducer at 350 GHz
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开发具有 350 GHz 平面正模换能器的双偏振 SIS 混频器
DOI：
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发表时间：
2013
影响因子：
1.8
通讯作者：
S. Shi
中科院分区：
文献类型：
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作者：
Kuan;Ming;Chao;Tse;S. Shi
在大约350 GHz的双极化超导体-绝缘体-超导体结混频器配备的多像素阵列被认为是提高望远镜的效率和调查速度。本研究以平面正交模转换器为关键元件，发展出一小型化混频器。来自圆波导的信号通过正交波导探针被分离成两个偏振，然后通过调谐电路传输到结。为了抑制谐振，金属块将RF信号限制在圆形波导内，并且在圆形波导上悬挂2 μ m厚的氮化硅膜，所有器件都在该膜上实现。用三维电磁模拟器模拟的正交模换能器在306和367 GHz之间具有小于-20 dB的交叉极化。中频电路由一个低通滤波器、共面波导和一个同轴转换器组成。从仿真和测量结果来看，中频电路的回波损耗小于-20 dB，最高可达16 GHz。超导体-绝缘体-超导体结型混频器的品质因数（Rsg/Rn）为8，在320 ~ 360 GHz之间，双边带接收机噪声温度Trx约为120 K。
A multipixel array equipped with dual-polarization superconductor-insulator-superconductor junction mixers at approximately 350 GHz is considered to improve the efficiency and survey speed of a telescope. This study develops a compact mixer with a planar orthomode transducer as a key component. Signals coming from a circular waveguide are separated into two polarizations via orthogonal waveguide probes, and then transmitted to the junctions through the tuning circuit. To suppress resonance, metallic blocks confine the RF signals within the circular waveguide, and a 2-μm-thick silicon nitride membrane, on which all devices were implemented, was suspended across the circular waveguide. The orthomode transducer, simulated with a three-dimensional electromagnetic simulator, has a cross-polarization of less than -20 dB between 306 and 367 GHz. The IF circuit consists of a low pass filter, coplanar waveguides, and a transition to coaxial. The return loss of the IF circuit is less than -20 dB up to 16 GHz from both simulations and measurements. The superconductor-insulator-superconductor junction mixers have been fabricated with quality factor (Rsg/Rn) of 8 and the double-side-band receiver noise temperature Trx is approximately 120 K between 320 and 360 GHz.
用于 CLOVER 的微带耦合 TES 测辐射热计
DOI：
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发表时间：
2008
期刊：
Ninteenth International Symposium on Space Terahertz Technology
影响因子：
--
作者：
Audley M. D.
通讯作者：
Audley M. D.